amp shuts down

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-94-accordh22

Copper - Posts: 53

Joined: September 20, 2005

Location: United States

Posted: December 02, 2005 at 12:24 AM / IP Logged

why is it when i turn up the volume and a low bass note hits the amp goes into protect?

audiobhan101

Copper - Posts: 59

Joined: October 30, 2005

Location: Canada

Posted: December 02, 2005 at 12:40 AM / IP Logged

Overheating? short? could be one of a million things. look at the BIg 3. Maybe your alternator cant get enough power to the amp.

give alittle more info like brands and specs.

84 Mazda Rx7 GS

4 15" Audiobahn High Excursion

1 2500W Orion Amp

Custom Box

dwarren

Platinum - Nominee - Posts: 1,811

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Joined: December 03, 2004

Location: California, United States

Posted: December 02, 2005 at 12:44 AM / IP Logged

Start with your ground for the amp. Where is it? Also what amp and subs?

A short would likely cause it to go in to protection right away.

I agree though that the big three would be the way to go either way, and with more info on the amp size, an alternator may be in your future.

KarTuneMan

Platinum - Posts: 7,056

This member consistently provides reliable information

Joined: December 14, 2004

Location: Isle Of Man

Posted: December 02, 2005 at 1:27 AM / IP Logged

Heat, Ground, battery condition......alternator output. ( it takes power to make power ) IN SHORT....THE BIG 3.....

The subs .....whats the load on the amp? Is it capable of putting out what your asking it to do?

geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: December 02, 2005 at 5:30 PM / IP Logged

The most common sources of these symptoms would be either improper impedence or incorrect gain control setting. How are your speakers wired to the amp (ohm load- stereo/mono) and how is the amp rated per channel/mono? You may have a bad spot in one of the voice coils- push the cones in/out with your hand while trying to measure a short. How did you set the gain controls? If you're not sure, do a search in here to find out how.

Ground/ low voltage will usually not send an amp into protect, rather the sound may simply cut out for a bit.

My ex once told me I have a perfect face for radio.

Teamrf

Gold - Posts: 1,031

Joined: January 13, 2004

Location: United States

Posted: December 02, 2005 at 5:38 PM / IP Logged

I say re-check your amp installation. Check the impedance on your subs too.

~The Rookie~

Rookie of the year that is...

Don't let the smoke out of your equiptment..it doesn't go back in.

-94-accordh22

Copper - Posts: 53

Joined: September 20, 2005

Location: United States

Posted: December 02, 2005 at 6:59 PM / IP Logged

sorry for the lack of specs.

i got a hifonics bx1500D, and 2 15" audiobahn subs. optima red top. stock alt. stinger wiring.

none of the hookups are the prob i got a meter and its getting plenty of power and a good ground.

im pretty sure my subs are wired for 1ohm operation. amp shuts down -- posted image.

but when i opened the amp case there was a small burn mark on the case??

let me know what you guys think. thanks

geepherder

Platinum - Posts: 3,668

Joined: October 27, 2003

Posted: December 02, 2005 at 7:59 PM / IP Logged

There's no need for the jumper wires that run from one sub to the other- remove them. Have you checked the impedences? Is your amp still under warranty?

My ex once told me I have a perfect face for radio.

-94-accordh22

Copper - Posts: 53

Joined: September 20, 2005

Location: United States

Posted: December 08, 2005 at 3:59 PM / IP Logged

yea amp is under warranty.

so i dont need the one black and one red from left sub to right sub?

im pretty sure it was 1 ohm but i didnt check with a dvom

DYohn

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Joined: April 22, 2003

Location: Arizona, United States

Posted: December 08, 2005 at 6:14 PM / IP Logged

As stated above, one or a combination of the following is happening:

1) the gain is too high. How did you set it?

2) the amplifier is overloading the car's electrical system and your voltage is dropping too low. Do you have a volt meter? What is the voltage at the amp when it goes into protect? If it drops too low (usually about 10.5 volts) the amp will go into protect, and if so you'll need a high output alternator.

3) The power cabling or ground connection is inadequate, causing the voltage to drop low enough to shut down the amp as above.

4) There is an electrical problem in one of the speakers, in the amp, or in the wiring. That diagram is wrong, by the way.

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